Science

Saturday, 28 March 2026
13 facts about tears
13 facts about tears
Multipurpose liquid
Associated with emotions, tears are a product of lacrimal glands, found in the eyes of most terrestrial vertebrates. Although their primary function i ...

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Earth
The first man to leave his home planet was Yuri Gagarin.
A two-hour flight by a Soviet astronaut outside the Earth's atmosphere took place in 1961.
Silver
Of all metals, it has the highest electrical conductivity, greater than copper.
However, it cannot be used for the production of electrical cables because it is subject to corrosio ...
Earth
The Earth orbits the sun in an elliptical orbit in 365.235 days.
The average distance from the Sun is 150 million km and ranges from 147.09 million km at the periapsis to 152.09 million km at the apsis.
NASA
The first NASA crewed Space Program was Project Mercury.
Although it is not well-remembered, it was the foundation for all space missions.
NASA
After the retirement of the Space Shuttle in 2011, NASA began the development of the Commercial Crew Program (CCP).
It is a joint program with private corporations—SpaceX, Boeing, and the Sierra Nevada. SpaceX provid ...
Milky Way
It is located in the Local Group of Galaxies.
It is an area spanning 10 million light years and located in the Laniakea supercluster. We do not kn ...
Snow
Snow is composed of ice crystals.
Each crystal is transparent, like ice. Light is reflected and scattered at the interface between the ...
Phobos
Some even speculate that this body may not come from a nearby asteroid belt, but from the outer regions of the Solar System.
The most recent theory proposes that both Phobos and Deimos shared a common progenitor that shattered upon collision with another object, forming two Mars satellites.
NASA
In 1998, NASA, in collaboration with Roscosmos (Russia), ESA (Europe), CSA (Canada), and JAXA (Japan), launched the first component of the International Space Station (ISS).
The ISS program evolved from the 1980s Space Station Freedom program. The first long-term residents ...
Cosmos
The observable universe is estimated to be 13.8 billion years old.
The limit of error in the calculation is 21 million years.